Renewable cartridge-fuse.



a. SABIHN'AI & L; a, COPE.

RENEWABLE CARTRIDGE FUSE. APPLICATION FILED OCT. I9, 1915.

Patented Feb.'12, 1918.

ESSES UNITED STATES PATENT OFFICE.

ERICK SLBHIA AND LESTER I. COPE, OF SHABP SBUBG, PENNSYLVANIA.

RENEWABLE CARTRIDGE-FUSE.

Specification of Letters Intent.

Patented Feb. 12, 1918.

Application filed October 19, 1915. Serial No. 56,704.

To all whom it may concern."

Be it known that we, EMERICH SABINA and Lns'rnn I. Cora, citizens of the United States, residing at Sharpsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Renewable Cartridge-Fuses, of which the following is a specification.

Our invention relates to electrical fuses and more particularly to a renewable cartrid fuse.

T e primary object of our invention resides in the provision of a, cartridge fuse or shell having novel means associated therewith for removably applying and clamping a fuse within the cartridge without the use of an tools thereby providing a device of the a ove character which may be readily and quickly placed in an operative position;

Another object of our invention resides in the provision of novel means associated with the ends of the cartridge for protecting the ends of the cartridge and for guiding the clamping means and causing them to contract to firmly, yet removably clamp a fuse in osition.

nother object of our invention resides in the provision of a novel means for mounting ihe blades on the respective ends of the uses.

A further object of our invention resides in the provision of a. device of the character described that is simple in construction, eflicient in operation and one that can be manufactured and placed on the market at a minimum cost. 1

Other objects as well as the nature. characteristic features and scope of ourinvention will be morereadily understood from the following description taken in connection with the accompanying drawings and pointed out in the claims forming a part of this specification. I

In the drawings Figure 1 is a longitudinal sectional view of our invention illustrating to advantage the novel means for removably clamping the fuse and blades in position, the blades being shown in side elevation;

Fig. 2 is a longitudinal sectional view of our invention illustrating to advantage the construction and arrangement of the clamping means and the blades,,the latter being shown in lan;

Figs 3 18 an end elevational view of the enlarged end of the clamping means;

a frusto-conical clamp,

Fig. 4 is a front elevational view of the blade holder; and

Fig. 5 is an end elevational view of th cartridge.

Referring more particularly to the drawings in which similar reference numerals designate like or corresponding parts throughout the different views, we provide a cartridge 1 preferably a fiber tube having external screw threads 2 adjacent the respective ends thereof while the respective outer edges are provided with oppositely disposed transverse grooves 3 for a purpose to be hereinafter referred to.

' In order to firmly, yet removably hold a fuse 4 in the cartridge, .we have provided our improved clamping means, in this instance including two complemental semicylindrical and tapering gripping wedges 5 having longitudinal grooves 6 ,on their flat surfaces which, when the two gripping wedges are placed together so that they form provide an elongated opening for receiving the respective ends of the fuse 4. Frusto-conical guides 7 having flanges 8 on their enlarged ends are arranged upon' the respective edges of the cartridge so that they project within the cartridge while the flanges are depressed at diametrically opposite points to provide ribs 9 the accidental displacement thereof, also mounting the knife blade contacts for the fuse, we have provided our improved cylindrical internally screw-threaded metallic caps 10, each of which has centrally disposed tapering openings 11 therein. Preparatory to engaging the screw-threaded caps on the screw threads 2 of the cartridge, we have associated the reduced ends 12 of rectangular and relative flat knife blade contacts 13 with the -openings 11. .Pins 14am formed integral with and extending longitudinally plate, the latter engaging sockets 18 provided in the enlarged ends of the gripping wedges 5. It will now be understood that when the blades and blade holding plate have been associated with the caps, when the caps are being arranged upon the ends of the cartridge, the lugs will engage the sockets and prevent accidental rotation of the blades.

The operation of our invention is as follows:

When the fuse d burns out, by unscrewing the caps 10, the clamping means can now be removed from about the ends of the old fuse to finally permit of the removal of the old fuse. A new fuse can now be inserted, clamped and maintained in position by the metallic clamping means and the latter maintained in position through the medium of the caps,

Although we have shown and described the preferred embodiment of our invention, we desire to be understood that we are not to be limited to the exact details shownever. we desire that great stress he laid the peculiar arrangement of means, the es therefor w operate the blade holding" plates are providing an eiiicient renewable fuse.

From the above description talten in connection with the accompanying draw: can easily be seen "'h device that is 7 taining but cheaply man when assembled can be placed upon the r lret and sold at a minimum cost.

It will be understood that the above description accompanvinn" drawings comprehend only the preferred embodiment of our invention and that various minor changes in detail of construction, proportion and arrangement of the parts may be made within the scope or the appended claims and without sacrificing any of the advantages of our invention.

Having thus fully described our invention, what we claim as new and desire to secure by Letters Patent, is

1. A. cartridge fuse holder comprising a. tubular member threaded at each end and adapted to contain a fuse, a clamping member closing each end of the tubular member and consisting of complemental sections havmg grooves therein to form a bore, when the sections are together, in which the end of the fuse engages, the outer faces of the clamping member having depressions therein, a plate for each end. oi the :t 'use and adapted for engagement with the outer ends of the clamping members, said plate having projections engageable in the depressions in said clamping member, whereby the plate is held against rotation. relative to the clamping members, lrnite blade contact projecting from each of said plates, a 'ierrule for each end of the cartridge and adapted for engagement thereon, said ferrule having a flange thereon adapted to retain the plate and clampin members in position and to move the sections or" the clamping member into clamping engagement with the fuse as the ferrule is threaded on the cartridge.

2. cartridge fuse holder comprising a tubular member having notches formed in the ends thereof, trusto-conical guides eX- tended in the ends of the tubular member and having projections for engagement in said notches for holding the guides against rotation, recessed wedge members for association with each of the guide members and having grooves therein to form a bore in, which the ends of the fuse engage,aplate for each end of the cartridge and adapted for engagement with the outer ends oi" said wedge members and having projections thereon for engagement in the recesses in wedge members wherel he bl against rotation relative e rs, knife blade contact late, and a f2""ll e o maintain said moving said wedge clamping engagement I the c he fuse as the terruie is moved in position on the cartridge.

u, use holder comprising a tubular a guide insertible in each mber and having a taer in, tapered ruse clamp l8 .1; e, the tapere portions 01 are guides headapted to he spaced "Erom the tubular member, means for torcing' and maintaining the clamps in position within the guides, and flange projecting from each guide and adapted to engage the end of the tubular member and to transmit a longitudinal pressure on the ends of the latter, when said clamping members are forced into clamping position.

A cartridge fuse holder comprising a tubular member composed of fiber material, a metallic truncated conical shell insertible in each end of the tubular member to form guides and adapted to have the tapered portions thereof lie spaced from the tubular member, a tapered fuse clamp insertible in each guide and composed of a plurality of complemental sections between which an end of the fuse is gripped, a. cap for each end 01 pol-ed pa sage of each the tubular member to be threaded thereon and to force and hold the clamp in position in the guide, a flange projecting from each guide for engagement with the edge of the tubular member to exert longitudinal pressure on the end of the latterwhen the clamping members are forced into clamping position in the guides.

5. A cartridge fuse holder comprising a tubular member for containing the fuse, a clamping member associated with each end of the tubular member to grip an end of the fuse, a plate adapted tolie on the outer ends of each of the clamping members and carrying a knife blade contact, a cap for each end of the tubular member adapted to be remov ably retained thereon for holding the plate in position and for moving the clamping members into clamping position, the clamping members having sockets therein, and spaced projections on the plates adapted to engage with said sockets to prevent rotation of the plates as the caps are placed in position, so that the knife blades will be retained in adjusted angular alinement with each other. v

6. A renewable cartridge fuse comprising a tube having threaded ends, a slotted cap to cooperate with each end of said tube, guides having flanges adapted to engage with the ends of the tube, clamping members insertible in said guides, which serve to position said member out of contact with the tube, means interposed between a lateral face of each of said members and a cap to prevent rotation of said members when the caps are screwed on, and a fuse adapted to be removlably held in said tube by the clamping memers. In testimony tures in presence of two witnesses.

'EMERICH SABINA. LESTER I. COPE. Witnesses:

JOSEPH'A. KAVANAGH, FRED W. SGHRANDT.

whereof we aflix our signa- 

